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Altera_Forum's avatar
Altera_Forum
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15 years ago

Using custom instruction from uCLinux user app on nios2mmu

Hello, Is it possible to use a custom instruction from an user application running on NIOS2MMU - uCLinux. I'm trying to run the CRC design example on uCLinux. When I try to compile the ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

AFAIK, an instruction can use registers that are modified by the previous one (at least for calculations, maybe when used as an address in a load or store instruction this might cause a hazard and thus stall the pipeline).

So there seems to be a shortcut for the register values and they don't need to be physically saved before being read by the next instruction.

-Michael